Project – Impact of Inflation on Household Consumption Patterns in Kosofe LGA, Lagos State

CHAPTER ONE

INTRODUCTION

1.1 Background to the Study

Inflation is one of the major macroeconomic problems affecting household welfare and economic decision-making in developing economies. It refers to a sustained increase in the general price level of goods and services over time, which reduces the purchasing power of money and alters the real value of household income. When prices rise faster than household income, consumers are forced to reconsider how available income is distributed among food, housing, transportation, education, healthcare, clothing, recreation and other needs. The effects of inflation are particularly important at the household level because consumption represents a major component of economic welfare and directly reflects the ability of families to satisfy their needs. In Nigeria, inflation has remained a persistent concern, with food, transportation, housing and other essential expenditures contributing substantially to household financial pressures. Osuji (2020), in an empirical study of Nigeria from 1981 to 2018, found a significant long-run relationship between inflation and household final consumption expenditure, demonstrating that changes in the general price level can influence household spending behaviour.

Household consumption patterns refer to the manner in which households allocate their available income among different goods and services to satisfy their needs and preferences. Consumption decisions are influenced by income, household size, prices, expectations, preferences, availability of goods and socioeconomic characteristics. According to Keynes (1936), current income is an important determinant of consumption, although households may also adjust their spending in response to expectations about future income and prices. The permanent income hypothesis developed by Friedman (1957) similarly suggests that consumption decisions are influenced by households’ perceptions of permanent rather than merely temporary income. In an inflationary environment, however, rising prices can substantially alter the purchasing power available to households, thereby influencing both the amount and composition of household consumption. Ewubare and Onah (2022), using Nigerian data, found a long-run relationship between household expenditure, household income and inflation, although their results indicated that income had a stronger influence on household expenditure than inflation.

The relationship between inflation and consumption can occur through several channels, particularly through the erosion of real household income. When the prices of goods and services increase while nominal income remains unchanged, households can purchase fewer goods and services with the same amount of money. This reduction in real purchasing power may cause households to reduce the quantity of goods purchased, switch from relatively expensive products to cheaper substitutes, postpone non-essential expenditure and prioritize basic necessities. Such responses are particularly significant for low- and middle-income households whose incomes are largely committed to food, transportation, housing and other essential needs. Olaoye, Ogunniyi and Fanifosi (2023) found that increases in food prices have significant welfare implications for Nigerian households and demonstrated that the burden of food-price increases differs across household groups because households have different consumption structures and capacities to substitute between commodities.

Food consumption represents a particularly important dimension of household consumption patterns in Nigeria because food constitutes a substantial share of household expenditure, especially among poorer households. When food prices rise rapidly, households may respond by reducing the quantity or quality of food consumed, changing the types of food purchased, substituting cheaper staples for preferred foods or reducing expenditure on non-food necessities to protect food consumption. The International Monetary Fund (2023) noted that food insecurity in Nigeria is strongly connected with food-price pressures and that poorer households have fewer substitutes for staple foods, making them more vulnerable to food inflation. More recent evidence also indicates that Nigeria experienced substantial food-price pressures between 2020 and 2024, with food inflation exceeding 40 percent during part of 2024, thereby intensifying pressures on household purchasing power and consumption decisions.

Inflation may also influence household expenditure on non-food items such as transportation, education, healthcare, clothing, communication, housing and recreation. When the cost of essential goods rises, households often face difficult choices regarding how much income should be allocated to competing needs. A household that previously spent a particular proportion of its income on education, healthcare or recreation may be forced to redirect some of those resources towards food, transportation and energy when prices increase substantially. The Nigerian General Household Survey provides evidence of the importance of examining consumption at both food and non-food levels because its 2023–2024 wave collected detailed information on food consumption, food expenditure, non-food expenditure, meals away from home, food security, income and other household welfare indicators. This demonstrates that household consumption is multidimensional and that changes in prices can potentially affect several expenditure categories simultaneously (National Bureau of Statistics [NBS], 2024).

The Nigerian economic environment has experienced substantial inflationary pressures in recent years, making the study of household consumption increasingly important. Changes in exchange rates, fuel prices, food supply conditions, transportation costs, monetary conditions and other structural factors have contributed to changes in the prices faced by households. The International Monetary Fund (2026) reports that Nigeria experienced pronounced inflationary pressures in 2024–2025 associated with exchange-rate pass-through, high food prices and fuel-price pressures. The 2025 rebasing of Nigeria’s Consumer Price Index also changed the composition and weights of the inflation basket to better reflect contemporary household consumption patterns, highlighting the close relationship between inflation measurement and the goods and services households actually consume. These developments suggest that household consumption patterns cannot be adequately understood without considering the inflationary environment within which households make expenditure decisions.

Empirical evidence from Nigeria provides mixed but important findings concerning the direction and magnitude of the relationship between inflation and household consumption. Osuji (2020) found a positive and significant long-run relationship between inflation and household final consumption expenditure, while Ewubare and Onah (2022) reported that inflation had a negative but relatively small effect on household consumption in both the short and long run. Olalere and Aladetanye (2025), using Nigerian data from 1981 to 2023, found that inflation significantly influenced household consumption expenditure alongside other factors such as aggregate savings and population dynamics. More recent research by Ewvarhono and Awogbemi (2026), covering 1986–2024, also found that inflation was positively associated with nominal household consumption expenditure, demonstrating that households may spend more in monetary terms even when their real purchasing power is under pressure. These differing findings indicate that inflation can affect household consumption through both price and quantity channels and that the direction of the observed relationship may depend on the measure of consumption employed and the period examined.

Kosofe Local Government Area provides an important context for examining the relationship between inflation and household consumption because households in the area participate in a highly urbanized and commercially active environment where expenditure on food, transportation, housing, education, healthcare, energy and other services forms an important part of everyday life. Changes in the prices of essential commodities can therefore have direct implications for how households distribute limited income among competing needs. In addition, households differ in income levels, family size, employment status and consumption preferences, meaning that inflation may not affect every household in exactly the same manner. Evidence from Nigerian household studies shows that households respond to economic shocks through different coping mechanisms, including consumption substitution and adjustments in household spending. Animashaun and Wossink (2024), using Nigerian household data, found that household responses to economic shocks vary according to household characteristics, location and consumption-substitution behaviour, reinforcing the importance of examining household-level responses to changing economic conditions.

Another important dimension of inflation is its effect on household purchasing power and welfare. Even where households maintain or increase their nominal consumption expenditure, they may still experience a decline in real welfare if the prices of goods and services increase faster than their incomes. Consequently, an increase in household spending should not automatically be interpreted as an improvement in household welfare. Households may be spending more money merely to purchase the same quantity of goods they previously purchased at lower prices. Adeleke and Rasak (2024), in their study of inflationary pressure and household final consumption expenditure in Nigeria, reported that inflation measured through the Consumer Price Index had a negative and statistically significant effect on household final consumption expenditure. This finding contrasts with studies reporting positive effects and reinforces the need to investigate how inflation influences actual consumption behaviour rather than relying exclusively on aggregate nominal expenditure.

Inflation can also influence the coping strategies adopted by households. When faced with persistent increases in prices, households may purchase goods in smaller quantities, reduce consumption of relatively expensive food products, switch to lower-quality or cheaper substitutes, delay purchases of durable goods, reduce savings, increase borrowing or seek additional sources of income. Such adjustments may help households manage immediate financial pressures but can have implications for nutrition, education, healthcare, savings and long-term welfare. Animashaun and Wossink (2024) found that Nigerian households adjust their consumption and other household decisions in response to aggregate economic shocks, with responses varying across household characteristics and circumstances. Similarly, Olaoye et al. (2023) demonstrated that food-price increases produce welfare effects that differ across household groups, suggesting that inflationary pressures can generate unequal consumption consequences.

The issue is particularly significant for urban households because urban residents generally depend more heavily on purchased goods and services than households that produce a substantial proportion of their own food. In an urban environment, increases in food prices are accompanied by increases in transportation, rent, electricity, healthcare, education and other expenses, potentially creating a cumulative effect on household budgets. The NBS General Household Survey Panel 2023–2024 specifically collects household information on food expenditure, non-food expenditure, petrol, food security, income and other welfare dimensions, illustrating the importance of studying household consumption as a broad welfare issue rather than as food expenditure alone (NBS, 2024). The relevance of these dimensions is particularly strong in an urban local government such as Kosofe, where households may experience different levels of exposure to market prices depending on income, employment and household characteristics.

Against this background, the present study focuses on the impact of inflation on household consumption patterns in Kosofe Local Government Area, Lagos State. The study is designed to examine how changes in the prices of goods and services influence household food consumption, non-food expenditure, purchasing decisions and allocation of household income among competing needs. It will also consider the extent to which inflation influences household decisions to substitute cheaper products, reduce quantities purchased, postpone non-essential expenditure and adjust spending priorities. The study is important because national inflation statistics provide an aggregate picture, whereas household consumption responses can differ considerably according to local economic circumstances, income and household characteristics. Evidence generated from Kosofe LGA may therefore provide useful insight into the household-level consequences of inflation and contribute to discussions concerning consumer welfare, household resilience and policies aimed at reducing the adverse effects of rising prices.

1.2 Statement of the Problem

Inflation has become a major economic concern for Nigerian households because persistent increases in the prices of goods and services can reduce the purchasing power of household income and alter established patterns of consumption. Although inflation is measured using aggregate price indices, its consequences are experienced directly by households when they purchase food, transportation, housing, education, healthcare and other necessities. Recent Nigerian inflationary pressures have been associated with food-price increases, exchange-rate movements and fuel-price changes, creating substantial pressure on household budgets. The International Monetary Fund (2026) notes that Nigeria experienced strong inflationary pressures during 2024–2025, while the NBS continues to provide regular Consumer Price Index reports documenting changes in headline and food inflation.

A major problem is that household income does not necessarily increase at the same rate as the prices of goods and services. When prices rise faster than income, households must redistribute limited financial resources among competing needs. This may result in reduced quantities of food purchased, substitution towards cheaper products, postponement of non-essential expenditure, reduction in savings and increased dependence on borrowing or additional income sources. Olaoye et al. (2023) found that food-price changes have significant welfare consequences for Nigerian households and that the effects vary across household groups. Similarly, Animashaun and Wossink (2024) showed that Nigerian households respond to economic shocks through different consumption and coping mechanisms.

Another problem concerns the uncertainty surrounding the actual direction and magnitude of the relationship between inflation and household consumption. Existing empirical studies have produced different findings. Osuji (2020) found a positive and significant long-run relationship between inflation and household final consumption expenditure, whereas Ewubare and Onah (2022) found a negative but relatively small effect of inflation on household consumption. Adeleke and Rasak (2024) also reported a negative and statistically significant effect of inflationary pressure on household final consumption expenditure, while Olalere and Aladetanye (2025) found that inflation significantly influenced household consumption expenditure. These differences suggest that inflation may affect household consumption differently depending on economic conditions, household characteristics, the period examined and whether nominal expenditure or real consumption is considered.

A further problem is the limited availability of localized empirical evidence on how inflation affects household consumption patterns specifically in Kosofe Local Government Area of Lagos State. National and macroeconomic studies provide valuable information about the relationship between inflation and aggregate household expenditure, but they may not adequately capture the day-to-day adjustments made by households within a particular urban local government. Differences in income, household size, occupation, food preferences, housing costs and access to markets may result in different responses to the same inflationary pressures. The NBS General Household Survey demonstrates the importance of collecting household-level information on food and non-food expenditure, income and welfare outcomes, while Nigerian empirical studies have shown that household responses to economic shocks vary across household characteristics and circumstances (NBS, 2024; Animashaun & Wossink, 2024).

It is against these identified problems that this study seeks to examine the impact of inflation on household consumption patterns in Kosofe Local Government Area, Lagos State. Specifically, the study will examine the effect of inflation on household food consumption, non-food consumption expenditure, purchasing behaviour and household budget allocation. The study is expected to provide localized evidence concerning the ways households respond to inflationary pressures and the extent to which rising prices alter their consumption decisions.

1.3 Objectives of the Study

The main objective of this study is to examine the impact of inflation on household consumption patterns in Kosofe Local Government Area, Lagos State.

The specific objectives are to:

1. examine the effect of inflation on household food consumption in Kosofe LGA, Lagos State;
2. determine the effect of inflation on household non-food consumption expenditure in Kosofe LGA, Lagos State;
3. assess the effect of inflation on household purchasing behaviour in Kosofe LGA, Lagos State; and
4. examine the effect of inflation on household budget allocation among competing needs in Kosofe LGA, Lagos State.

1.4 Research Questions

The following research questions will guide the study:

1. What effect does inflation have on household food consumption in Kosofe LGA, Lagos State?
2. What effect does inflation have on household non-food consumption expenditure in Kosofe LGA, Lagos State?
3. What effect does inflation have on household purchasing behaviour in Kosofe LGA, Lagos State?
4. What effect does inflation have on household budget allocation among competing needs in Kosofe LGA, Lagos State?

1.5 Research Hypothesis

The following null hypothesis will be tested at the 0.05 level of significance:

H₀: Inflation has no significant impact on household consumption patterns in Kosofe LGA, Lagos State.

1.6 Significance of the Study

The study will be significant to households because it will provide a better understanding of how inflation affects everyday consumption decisions. The findings may help households recognize changes in their spending patterns and understand the importance of budgeting, prioritization and appropriate consumption adjustments during periods of rising prices.

The study will be useful to government and economic policymakers because it will provide localized evidence concerning the consequences of inflation on household welfare. The findings may assist policymakers in designing interventions relating to price stability, food security, social protection, income support and other measures aimed at protecting household purchasing power.

The study will also be beneficial to consumer organizations and community development stakeholders because it will provide information about the practical ways in which households respond to rising prices. Such information may support consumer education, household financial-management programmes and community-level interventions designed to strengthen household resilience.

The study will be useful to economists and researchers because it will contribute to the empirical literature on inflation and household consumption behaviour in Nigeria. The localized focus on Kosofe LGA will provide an opportunity to compare household-level findings with evidence obtained from national and other regional studies.

Finally, the study will be relevant to students and academic institutions because it will provide a reference for further research in economics, development studies, consumer behaviour, household economics and related disciplines. The findings may also help future researchers identify areas requiring additional investigation, particularly concerning inflation, household welfare and consumption adjustments in urban Nigerian communities.

1.7 Scope of the Study

The study focuses on the impact of inflation on household consumption patterns in Kosofe Local Government Area, Lagos State.

The independent variable of the study is inflation, while the dependent variable is household consumption patterns.

Household consumption patterns will be examined through four major dimensions:

• Household food consumption;
• Household non-food consumption expenditure;
• Household purchasing behaviour; and
• Household budget allocation among competing needs.

The geographical scope of the study is restricted to Kosofe Local Government Area of Lagos State. The study will focus on selected households within the local government area.

The study is concerned primarily with the effect of changes in the prices of goods and services on household consumption decisions. Although factors such as household income, household size, employment, interest rates, exchange rates and socioeconomic characteristics may influence consumption, they are not the primary independent variables of the study.

1.8 Operational Definition of Terms

Inflation: A sustained increase in the general price level of goods and services in an economy over a period of time, resulting in a decline in the purchasing power of money.

Household: A person or group of persons living together and sharing arrangements for the provision and consumption of basic needs.

Household Consumption: The expenditure by households on goods and services for the satisfaction of their immediate and future needs.

Consumption Pattern: The manner in which households distribute their available income among different categories of goods and services.

Food Consumption: Household expenditure and use of food products such as grains, tubers, meat, fish, vegetables, fruits, beverages and other food items.

Non-Food Consumption: Household expenditure on goods and services other than food, including transportation, housing, clothing, education, healthcare, communication, energy and recreation.

Purchasing Behaviour: The decisions and actions of households concerning what, when, where and how much they purchase in response to prices, income and other economic conditions.

Household Budget Allocation: The process through which a household distributes its available income among competing needs and expenditure categories.

Purchasing Power: The quantity of goods and services that can be purchased with a given amount of money at prevailing prices.

Food Inflation: The rate at which the prices of food items increase over a given period.

Household Welfare: The economic and material well-being of household members as reflected in their ability to obtain food, shelter, healthcare, education and other necessities of life.

Substitution: The process through which households replace relatively expensive goods or services with cheaper alternatives when prices change.

Cost of Living: The amount of money required by a household to maintain a particular standard of living based on prevailing prices of goods and services.

Project – Impact of Inflation on Household Consumption Patterns in Kosofe LGA, Lagos State